Will Smith has been getting candid about his family life as he promotes his new book, Will, and revealed a lesson he learnt from his youngest child during a public appearance on Tuesday night.MORE: Will Smith left in disbelief over drastic change to daughter Willow's appearanceThe Fresh Prince of Bel Air star hosted a storytelling event at Kings Theatre in Brooklyn, New York, titled Will Smith: An Evening of Stories with Friends, where he recalled how he handled Willow's rise to fame."I felt